Rails RspecでFactoryBotを使おうとすると、NameErrorになる

Question

###前提・試したいこと
Railsを学習し始めてから3ヶ月ほどの初心者です。

RSpecにて、FactoryBotを用いて、ユーザーの作成をしたいのですが、NameErrorになります。

###発生している問題・エラーメッセージ

Failure/Error: config.include FactoryBot::Syntax::Methods

NameError:
  uninitialized constant FactoryBot
# /usr/local/bundle/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/core_ext/active_support.rb:79:in `block in load_missing_constant'
# /usr/local/bundle/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/core_ext/active_support.rb:8:in `without_bootsnap_cache'
# /usr/local/bundle/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/core_ext/active_support.rb:79:in `rescue in load_missing_constant'
# /usr/local/bundle/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/core_ext/active_support.rb:58:in `load_missing_constant'
# ./spec/rails_helper.rb:63:in `block in <top (required)>'
# ./spec/rails_helper.rb:35:in `<top (required)>'
# ./spec/requests/worker_users_spec.rb:1:in `<top (required)>'
# ------------------
# --- Caused by: ---
# NameError:
#   uninitialized constant FactoryBot
#   /usr/local/bundle/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/core_ext/active_support.rb:60:in `block in load_missing_constant'
No examples found.


Finished in 0.00012 seconds (files took 7.56 seconds to load)
0 examples, 0 failures, 1 error occurred outside of examples

###該当のソースコード
requests/worker_user_spec.rb

require 'rails_helper'

RSpec.describe "WorkerUsers", type: :request do
  describe "ログインページにアクセスすると" do
    context '未ログインの場合' do
      it "リクエストが成功すること。" do
        get new_worker_user_session_path
        expect(response).to have_http_status(200)
      end
    end

    context 'ログイン済みの場合' do
      before do
        user = FactoryBot.create(:worker_user)
        sign_in user
      end

      it "ユーザーページにリダイレクトされること。" do
        get new_worker_user_session_path
        expect(response).to have_http_status(302)
      end
    end
  end

  # describe "会員登録ページにアクセスすると" do
  #   it "リクエストが成功すること。" do
  #     get new_worker_user_registration_path
  #     expect(response).to have_http_status(200)
  #   end
  # end
end

factorys/worker_users.rb

# frozen_string_literal: true

FactoryBot.define do
  factory :worker_user do
    sei { 'サンプル'}
    mei { '太郎'}
    sequence(:email)    { |n| "sample#{n}@example.com" }
    password { 'pasword' }
    confirmed_at { Date.today }
  end
end

spec/rails_helper.rb

# This file is copied to spec/ when you run 'rails generate rspec:install'
require 'spec_helper'
ENV['RAILS_ENV'] ||= 'test'

require File.expand_path('../config/environment', __dir__)

# Prevent database truncation if the environment is production
abort("The Rails environment is running in production mode!") if Rails.env.production?
require 'rspec/rails'
# Add additional requires below this line. Rails is not loaded until this point!

# Requires supporting ruby files with custom matchers and macros, etc, in
# spec/support/ and its subdirectories. Files matching `spec/**/*_spec.rb` are
# run as spec files by default. This means that files in spec/support that end
# in _spec.rb will both be required and run as specs, causing the specs to be
# run twice. It is recommended that you do not name files matching this glob to
# end with _spec.rb. You can configure this pattern with the --pattern
# option on the command line or in ~/.rspec, .rspec or `.rspec-local`.
#
# The following line is provided for convenience purposes. It has the downside
# of increasing the boot-up time by auto-requiring all files in the support
# directory. Alternatively, in the individual `*_spec.rb` files, manually
# require only the support files necessary.
#
Dir[Rails.root.join('spec', 'support', '**', '*.rb')].each { |f| require f }

# Checks for pending migrations and applies them before tests are run.
# If you are not using ActiveRecord, you can remove these lines.
begin
  ActiveRecord::Migration.maintain_test_schema!
rescue ActiveRecord::PendingMigrationError => e
  puts e.to_s.strip
  exit 1
end
RSpec.configure do |config|
  # Remove this line if you're not using ActiveRecord or ActiveRecord fixtures
  config.fixture_path = "#{::Rails.root}/spec/fixtures"

  # If you're not using ActiveRecord, or you'd prefer not to run each of your
  # examples within a transaction, remove the following line or assign false
  # instead of true.
  config.use_transactional_fixtures = true

  # RSpec Rails can automatically mix in different behaviours to your tests
  # based on their file location, for example enabling you to call `get` and
  # `post` in specs under `spec/controllers`.
  #
  # You can disable this behaviour by removing the line below, and instead
  # explicitly tag your specs with their type, e.g.:
  #
  #     RSpec.describe UsersController, :type => :controller do
  #       # ...
  #     end
  #
  # The different available types are documented in the features, such as in
  # https://relishapp.com/rspec/rspec-rails/docs
  config.infer_spec_type_from_file_location!

  config.include RequestSpecHelper, type: :request
  config.include Devise::Test::IntegrationHelpers, type: :system
  
  # Filter lines from Rails gems in backtraces.
  config.filter_rails_from_backtrace!
  # arbitrary gems may also be filtered via:
  # config.filter_gems_from_backtrace("gem name")
end

Gemfile

# frozen_string_literal: true

source 'https://rubygems.org'
git_source(:github) { |repo| "https://github.com/#{repo}.git" }

ruby '2.6.3'
gem 'bootsnap', '>= 1.1.0', require: false
gem 'coffee-rails', '~> 4.2'
gem 'jbuilder', '~> 2.5'
gem 'pg', '>= 0.18', '< 2.0'
gem 'puma', '~> 3.11'
gem 'rails', '~> 5.2.3'
gem 'sass-rails', '~> 5.0'
gem 'turbolinks', '~> 5'
gem 'uglifier', '>= 1.3.0'

group :development, :test do
  gem 'byebug', platforms: %i[mri mingw x64_mingw]
end

group :development do
  gem 'factory_bot_rails', '~> 5.1'
  gem 'listen', '>= 3.0.5', '< 3.2'
  gem 'rspec-rails'
  gem 'rubocop', '~> 0.76.0'
  gem 'rubocop-performance', '~> 1.5'
  gem 'spring', '~> 2.1'
  gem 'spring-watcher-listen', '~> 2.0.0'
  gem 'web-console', '>= 3.3.0'
end

group :test do
  gem 'capybara', '>= 2.15'
  gem 'chromedriver-helper'
  gem 'selenium-webdriver'
end

gem 'tzinfo-data', platforms: %i[mingw mswin x64_mingw jruby]

gem 'acts-as-taggable-on', '~> 6.0'
gem 'carrierwave', '1.2.2'
gem 'devise'
gem 'faker'
gem 'html2slim'
gem 'i18n', '~> 1.7'
gem 'mini_magick', '4.7.0'
gem 'omniauth-facebook'
gem 'ransack', '~> 2.3'
gem 'slim-rails', '3.1.3'
gem 'kaminari', '>= 1.1.1'

###試したこと
コンソール似て、FactoryBot.createを実行してみました。

irb(main):001:0> FactoryBot.create(:worker_user)

すると、正常にユーザーを作成することができました。

###補足情報（FW/ツールのバージョンなど）
ruby 2.6.2
rails 5.2.3
macOS 10.14.6

Answer 1

FactoryBotが認識されていないですね。
spec/rails_helper.rb に FactroyBotの定義はしましたか？